DEBT - Convertible Note Hedge and Warrant Transactions (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	Jul. 24, 2020	May 31, 2017	Sep. 30, 2022	Jul. 21, 2020	May 24, 2017
Debt Instrument [Line Items]
Share price (in dollars per share)			$ 23.86
Termination of convertible note hedge on the 0.625% Convertible Senior Notes	$ 109.9
Payments for repurchase of warrants	94.3
2020 Hedge and Warrants
Debt Instrument [Line Items]
Net proceeds from debt used to pay for the cost of the hedge	63.0
Payment of convertible note hedge transactions	$ 124.2
Number of shares covered by the hedge transactions	1.2
Initial conversion price per share (in dollars per share)	$ 461.19
Strike price of warrants sold (in dollars per share)	$ 709.52
Premium of warrant strike price over sales price of common stock	100.00%
Share price (in dollars per share)				$ 354.76
Proceeds from the sale of warrants related to the Convertible Senior Notes	$ 61.2
2017 Hedge and Warrants
Debt Instrument [Line Items]
Net proceeds from debt used to pay for the cost of the hedge		$ 18.1
Payment of convertible note hedge transactions		$ 61.5
Number of shares covered by the hedge transactions		1.4
Initial conversion price per share (in dollars per share)		$ 207.63
Strike price of warrants sold (in dollars per share)		$ 266.39
Premium of warrant strike price over sales price of common stock		70.00%
Share price (in dollars per share)					$ 156.70
Proceeds from the sale of warrants related to the Convertible Senior Notes		$ 43.4
Warrants outstanding (in shares)			0.8
Proceeds from hedge and warrants	$ 15.6